A NATO official says a fighter jet has crashed at NATO's largest base in southern Afghanistan, the second major crash at the base in two days. Capt. Ruben Hoorncelv, a spokesman for the NATO-led force, says a fighter jet crashed inside Kandahar Air Field during takeoff at 7:20 a.m. Afghanistan time Monday. The two-man crew ejected from the jet and are being treated at the base hospital. Hoorncelv says there is no indication insurgent activity caused the crash, but that officials don't yet know why it went down. The jet caught fire and emergency personnel responded. A Russian-owned civilian helicopter crashed at Kandahar Air Field on Sunday, killing 16 people on board. Hoorncelv says he thinks the rash of crashes is coincidence.